This is the fleet Ancient city ship inspired by the Atlantis city ship seen in Star Gate Atlantis. IT IS NOT ATLANTIS.
I place it being deployed soon after the Manifest design and it has the capability of carrying a Manifest class ship.
The first thing to remember is that it is inspired by Atlantis but IT IS NOT ATLANTIS so don't come back with Atlantis
had this or that. If you want a dead accurate Atlantis this is not the add-on for you.